Chemical Thermodynamics Question 357
Question: Hydrogen has an ionisation energy of $ 1311kJmo{{l}^{-1}} $ and for chlorine it is $ 1256kJmo{{l}^{-1}}. $ Hydrogen forms $ {{H}^{+}}( aq ) $ ions but chlorine does not form $ C{{l}^{+}}(aq) $ ions because
Options:
A) $ {{H}^{+}} $ has lower hydration enthalpy
B) $ C{{l}^{+}} $ has lower hydration enthalpy
C) $ Cl $ has high electron affinity
D) $ Cl $ has high electronegativity
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Answer:
Correct Answer: B
Solution:
- Hydration energy of $ C{{l}^{+}} $ is very less than $ {{H}^{+}} $ hence it doesn’t form $ C{{l}^{+}} $ (aq) ion.
